Question 79724
• Explain what the value of the discriminant means to the graph of y = ax2 + bx + c. Hint: Chose values of a, b and c to create a particular discriminant. Then, graph the corresponding equation.
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Do that:
y=2x^2+3x+0 will pass thru the x axis twice because b^2-4ac>0
y=2x^2+3x+7 will not touch the x axis because b^2-4ac<0
y=x^2+4x+4 will touch but not pass thru the x axis because b^2-4ac=0
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• Search the Library and Internet. In the real world, where might these imaginary numbers be used?
Use Google: Imaginary numbers are used in modeling electricity, for example.
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Cheers,
Stan H.